CN202019296U - Self-adapting ultra-wide voltage power supply of 3G video monitoring equipment - Google Patents
Self-adapting ultra-wide voltage power supply of 3G video monitoring equipment Download PDFInfo
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- CN202019296U CN202019296U CN2010206221429U CN201020622142U CN202019296U CN 202019296 U CN202019296 U CN 202019296U CN 2010206221429 U CN2010206221429 U CN 2010206221429U CN 201020622142 U CN201020622142 U CN 201020622142U CN 202019296 U CN202019296 U CN 202019296U
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Abstract
The utility model discloses a self-adapting ultra-wide voltage power supply of 3G (3rd generation) video monitoring equipment. The input of the power supply adopts a vehicle power supply, and the output adopts a 3G video monitoring system; the self-adapting ultra-wide voltage power supply comprises three levels, namely, a first level, a second level, and a third level; the first level comprises a reverse-connection-prevention protection part, a surge protection part, a common-mode choke part, a filtering part and a DC/DC processing part; the second level comprises a secondary voltage reducing part, a filtering part, and a DC/DC processing part; the third level comprises a tertiary voltage reducing part, a filtering part and a DC/DC processing part; the first level input adopts the vehicle power supply, and the first level is connected with an external camera and the second level respectively; and the second level is connected with a 3G and GPS (Global Positioning System) communication module power supply and the third level respectively. The self-adapting ultra-wide voltage power supply is used for supplying power to the vehicle-mounted 3G video monitoring equipment, not only can provide different power supplies for different parts of the 3G video monitoring equipment, but also can provide reliable and stable voltage.
Description
Technical field
The utility model relates to the supply unit of vehicle-bone 3 G video monitoring equipment.
Background technology
The environment for use of 3G wireless video monitoring system is on the automobile that moves, because the electromagnetic environment in the automobile is comparatively abominable.The electric equipment of automobile can produce a large amount of electromagnetic interference when operation, the frequency band of these interference is very wide, and the mode by conduction, coupling or radiation propagates in the power-supply system, and then has influence on the operate as normal of electronic equipment.Worst situation often since vehicle self produce interference produced, as the disturbing pulse of ignition system, generator and rectifier systems.Therefore this system needs stable electric power system, and high performance vehicle power design is the guarantee of whole system reliably working.
The utility model content
In order to overcome the above problems, the utility model provides the supply unit of vehicle-bone 3 G video monitoring equipment, for the 3G video monitoring equipment provides power supply, it can satisfy the needed different electrical power of 3G video monitoring equipment different piece, can provide reliable and stable voltage again.
The utility model is following structure:
This power supply is input as vehicle power supply, be output as the 3G video monitoring system, form by three grades altogether, comprise the first order, the second level, the third level, the first order includes anti-reverse protection part, surge protection part, common mode chokes part, filtering part and DC/DC processing section; The second level comprises secondary step-down part, filtering part and DC/DC processing section, and the third level comprises three step-downs part and filtering part and DC/DC processing section; The first order is input as vehicle power supply, and the first order is connected, is connected with the second level with external camera respectively; The second level is connected with GPS communication module power supply with 3G respectively, and is connected with the third level.
In the power supply first order, be provided with wide pressure input power supply chip LM5118 switching regulator; Be provided with power supply chip MP2303, power supply chip TPS54314, power supply chip TPS6204DGQ in the power supply third level; Wherein be equipped with small one and large one two electric capacity on its input pin limit of power supply chip TPS6204DGQ, wherein big electric capacity uses tantalum electric capacity.
The beneficial effects of the utility model are; adopt wide pressure input power supply chip LM5118 switching regulator in the power supply first order; its energy efficiency is up to 95%; belong to high-energy source efficient chip; can provide industry the most wide voltage-operated; but the configuration switch frequency reaches as high as 500kH, and the electric current when shutdown mode is extremely low.Can between step-down and two kinds of patterns of buck/boost, switch reposefully.Imitative Controlled in Current Mode and Based technology can guarantee that not only circuit and load have the transient response that is exceedingly fast, and duty ratio is also extremely low during operation.So be highly suitable for in-vehicle electronic system.
Adopt chip MP2303 the power supply third level, chip TPS54314, power supply designs such as chip TPS6204DGQ, DC/DC handles and finishes various types of power source conversion according to practical application, as 5V, 3.3V, 1.8V, 1.2V, 1.1V etc.Be equipped with small one and large one two electric capacity on its input pin limit,, also have the effect of energy storage except filtering noise.
Description of drawings
Fig. 1 the utility model structure chart;
Schematic diagram is used in the output of Fig. 2 the utility model third level.
Embodiment
Below in conjunction with drawings and Examples the utility model is further specified, this power supply can be implemented in the following manner:
Front end adopts the biswitch design, can set up a power supply changeover device that function is complete and input voltage range is extremely wide easily.If input voltage is higher than the adjusted output voltage far away, the LM5118 chip just can be carried out the function of lowering and stabilizing blood pressure device, but if input voltage is reduced to the level near output voltage, chip just can be used the buck/boost pattern instead gradually.This double mode design is applicable to wide input voltage range, and can not produce glitch when the conversion decompression pattern, brings into play high conversion efficiency.In addition, a plurality of drivers of built-in chip type can be supported high-end step-down MOSFET and the low side MOSFET that boosts respectively.Imitative Controlled in Current Mode and Based technology can reduce the sensitivity of pulse width modulation (PWM) circuit to noise jamming, duty ratio can be stablized be controlled at minimum level, thereby meet the requirement of high input voltage system.Also have defencive functions such as current limliting, overheated shutdown and permission input in addition.
Imitative Controlled in Current Mode and Based technology is carried out Controlled in Current Mode and Based by the step-down switching current signal of simulation, with the interference of reducing noise to circuit.This be traditional Controlled in Current Mode and Based technology can't accomplish.Imitative step-down switching current signal is to carry out the imitation slope current before the switching manipulation and the summation of diode sample rate current.Owing to need not directly to measure the step-down switching electric current, therefore the interference of switching noise can be reduced to minimum, but can give full play to the advantage of Controlled in Current Mode and Based simultaneously again.
In conjunction with the accompanying drawings embodiment of the present utility model has been carried out exemplary description above, obviously the utility model is not limited thereto, and the various remodeling that carry out in the utility model scope all do not exceed protection range of the present utility model.
Claims (2)
1.3G the self adaptation super wide voltage power supply of video monitoring equipment, be input as vehicle power supply, be output as the 3G video monitoring system, it is characterized in that, form by three grades altogether, comprise the first order, the second level, the third level, the first order includes anti-reverse protection part, surge protection part, common mode chokes part, filtering part and DC/DC processing section; The second level comprises secondary step-down part, filtering part and DC/DC processing section, and the third level comprises three step-downs part and filtering part and DC/DC processing section; The first order is input as vehicle power supply, and the first order is connected, is connected with the second level with external camera respectively; The second level is connected with GPS communication module power supply with 3G respectively, and is connected with the third level.
2. the self adaptation super wide voltage power supply of 3G video monitoring equipment according to claim 1 is characterized in that, is provided with wide pressure input power supply chip LM5118 switching regulator in the power supply first order; Be provided with power supply chip MP2303, power supply chip TPS54314, power supply chip TPS6204DGQ in the power supply third level; Wherein be equipped with small one and large one two electric capacity on its input pin limit of power supply chip TPS6204DGQ, wherein big electric capacity uses tantalum electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206221429U CN202019296U (en) | 2010-11-24 | 2010-11-24 | Self-adapting ultra-wide voltage power supply of 3G video monitoring equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206221429U CN202019296U (en) | 2010-11-24 | 2010-11-24 | Self-adapting ultra-wide voltage power supply of 3G video monitoring equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202019296U true CN202019296U (en) | 2011-10-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206221429U Expired - Fee Related CN202019296U (en) | 2010-11-24 | 2010-11-24 | Self-adapting ultra-wide voltage power supply of 3G video monitoring equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202019296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869858A (en) * | 2012-12-11 | 2014-06-18 | 厦门雅迅网络股份有限公司 | Vehicle-mounted electronic device power supply self-adaptation control method and system thereof |
| CN104571433A (en) * | 2013-10-21 | 2015-04-29 | 北京计算机技术及应用研究所 | Vehicular computer power supply and surge voltage suppression method thereof |
-
2010
- 2010-11-24 CN CN2010206221429U patent/CN202019296U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103869858A (en) * | 2012-12-11 | 2014-06-18 | 厦门雅迅网络股份有限公司 | Vehicle-mounted electronic device power supply self-adaptation control method and system thereof |
| CN104571433A (en) * | 2013-10-21 | 2015-04-29 | 北京计算机技术及应用研究所 | Vehicular computer power supply and surge voltage suppression method thereof |
| CN104571433B (en) * | 2013-10-21 | 2018-04-20 | 北京计算机技术及应用研究所 | A kind of vehicle computing electromechanical source and its surging voltage suppressing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Chengdu Yimeng Hengxin Technology Co., Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: Chengdu Yimeng Hengxin Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111026 Termination date: 20131124 |